g-p ggg ggn ggo ggp ggr gnn gno gnp gnr gog gon goo gop gor gpg gpn gpo gpp gpr grg grn gro grp grr ngg ngn ngo ngp nng nnn nno nnp no- nog non noo nop nor npg npn npo npp npr nrg nrn nro nrp nrr ogg ogn ogo ogp on- ong onn ono onp onr oo- oog oon ooo oop oor op- opg opn opo opp opr or- org orn oro orp orr p-p pgg pgn pgo pgp pgr pn- png pnn pno pnp pnr pog pon poo pop por ppg ppn ppo ppp ppr prg prn pro prp prr rgg rgn rgo rgp rgr rng rnn rno rnp rnr rog ron roo rop ror rpg rpn rpo rpp rpr rrg rrn rrp rrr